Alert archive / Pennsylvania / Special Weather Statements in 2024

Special Weather Statement, NWS State College, PA

August 9, 2024Union County, Pennsylvania

NWS State College, PA issued this special weather statement at Aug 9, 2024, 6:28 AM EDT for Union County, Pennsylvania. It was in force for 32 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Aug 9, 2024, 6:28 AM EDT (10:28 UTC)
Expired
Aug 9, 2024, 7:00 AM EDT
In force
32 min
Issued by
NWS State College, PA
Hail
0.00 in
Wind
50

County Union County, PA

The radar

The State College radar (KCCX), 93 km from the middle of the area, began a volume at 10:33 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 00:00Z, 10.5 hours before the alert went out and 235 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Washington/Dulle, VA at 00:00Z on 2024-08-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 886 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Washington/Dulle, VA at 00:00Z on 2024-08-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 70 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
886 J/kg
Mixed-layer CIN
-5 J/kg
Mixed-layer LCL
607 m above ground
0-6 km bulk shear
22 kt
0-1 km storm-relative helicity
70 m²/s²
0-3 km storm-relative helicity
132 m²/s²
Significant tornado parameter
0.2
Supercell composite
1.4

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS State College, PA wrote its last area forecast discussion before this special weather statement went out at Aug 9, 5:38 AM EDT, 50 minutes earlier.

Area forecast discussion, Aug 9, 5:38 AM EDT, 50 minutes before
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Hazardous weather outlook, Aug 9, 6:24 AM EDT, 4 minutes before
Hazardous Weather Outlook
National Weather Service State College PA
624 AM EDT Fri Aug 9 2024

PAZ004-101030-
Warren-
624 AM EDT Fri Aug 9 2024

This Hazardous Weather Outlook is for central Pennsylvania.

.DAY ONE...Today and tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

PAZ005-010-101030-
McKean-Elk-
624 AM EDT Fri Aug 9 2024

...FLOOD WATCH IN EFFECT UNTIL 2 PM EDT THIS AFTERNOON...

This Hazardous Weather Outlook is for central Pennsylvania.

.DAY ONE...Today and tonight.

Please listen to NOAA Weather Radio or go to
weather.gov/StateCollege on the internet for more
information about the following hazards.

   Flood Watch.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

PAZ028-041-042-046-049>053-056>059-063>066-101030-
Juniata-Northern Lycoming-Sullivan-Southern Lycoming-Union-Snyder-
Montour-Northumberland-Columbia-Perry-Dauphin-Schuylkill-Lebanon-
Cumberland-Adams-York-Lancaster-
624 AM EDT Fri Aug 9 2024

...FLOOD WATCH NOW IN EFFECT THROUGH THIS AFTERNOON...
...TORNADO WATCH 616 IN EFFECT UNTIL 2 PM EDT THIS AFTERNOON...

This Hazardous Weather Outlook is for central Pennsylvania.

.DAY ONE...Today and tonight.

Please listen to NOAA Weather Radio or go to
weather.gov/StateCollege on the internet for more
information about the following hazards.

   Flood Watch.
   Tornado Watch.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Spotters are encouraged to report significant hazardous weather.

PAZ006-011-012-017>019-024>027-033>037-045-101030-
Potter-Cameron-Northern Clinton-Clearfield-Northern Centre-
Southern Centre-Cambria-Blair-Huntingdon-Mifflin-Somerset-Bedford-
Fulton-Franklin-Tioga-Southern Clinton-
624 AM EDT Fri Aug 9 2024

...FLOOD WATCH NOW IN EFFECT THROUGH THIS AFTERNOON...

This Hazardous Weather Outlook is for central Pennsylvania.

.DAY ONE...Today and tonight.

Please listen to NOAA Weather Radio or go to
weather.gov/StateCollege on the internet for more
information about the following hazards.

   Flood Watch.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Spotters are encouraged to report significant hazardous weather.

In the hours before

Special weather statement, Aug 9, 6:05 AM EDT, 23 minutes before
Special Weather Statement
National Weather Service State College PA
605 AM EDT Fri Aug 9 2024

PAZ049-050-052-091030-
Union PA-Northumberland PA-Snyder PA-
605 AM EDT Fri Aug 9 2024

...A STRONG THUNDERSTORM WILL IMPACT NORTHWESTERN NORTHUMBERLAND...
EASTERN SNYDER AND EASTERN UNION COUNTIES THROUGH 630 AM EDT...

At 604 AM EDT, Doppler radar was tracking a strong thunderstorm over
Selinsgrove, moving north at 40 mph.

HAZARD...Wind gusts up to 50 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects.

Locations impacted include...
Milton, Lewisburg, Selinsgrove, Mifflinburg, Winfield, Watsontown,
Linntown, Hummels Wharf, Middleburg, New Columbia, Montandon,
Kreamer, Port Trevorton, Penns Creek, Richfield, Mount Pleasant
Mills, Kratzerville, Allenwood, Paxtonville, and Vicksburg.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Very heavy rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

&&

LAT...LON 4067 7691 4069 7711 4108 7704 4109 7698
      4112 7697 4110 7675
TIME...MOT...LOC 1004Z 191DEG 36KT 4083 7695

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...50 MPH

Beaty/DeVoir
Special weather statement, Aug 9, 6:28 AM EDT, 0 minutes before
Special Weather Statement
National Weather Service State College PA
628 AM EDT Fri Aug 9 2024

PAZ046-049-050-052-091100-
Southern Lycoming PA-Union PA-Northumberland PA-Snyder PA-
628 AM EDT Fri Aug 9 2024

...A STRONG THUNDERSTORM WILL IMPACT NORTHWESTERN NORTHUMBERLAND...
NORTHEASTERN SNYDER...SOUTH CENTRAL LYCOMING AND EASTERN UNION
COUNTIES THROUGH 700 AM EDT...

At 627 AM EDT, Doppler radar was tracking a strong thunderstorm over
Lewisburg, moving north at 35 mph.

HAZARD...Wind gusts up to 50 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects.

Locations impacted include...
Williamsport, Milton, Lewisburg, Montoursville, Winfield, Muncy,
Watsontown, Montgomery, Linntown, Duboistown, New Columbia,
Montandon, Kratzerville, Allenwood, Vicksburg, Elimsport, Spruce Run
Reservoir, Delaware Run, South Williamsport, and West Milton.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Very heavy rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

A Tornado Watch remains in effect until 200 PM EDT for central and
north central Pennsylvania.

&&

LAT...LON 4086 7685 4087 7702 4129 7704 4126 7674
TIME...MOT...LOC 1027Z 187DEG 31KT 4094 7693

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...50 MPH

Beaty

The office that day

Everything else NWS State College, PA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 9, 12:12 AM EDTFlash Flood WarningCTPBedford, Fulton3 hr
Aug 9, 4:30 AM EDTFlash Flood WarningCTPCumberland, Dauphin, York99 min
Aug 9, 5:10 AM EDTAreal Flood WarningCTPBedford, Fulton5 hr
Aug 9, 6:05 AM EDTSpecial Weather StatementCTPSnyder, Union25 min
Aug 9, 6:34 AM EDTAreal Flood WarningCTPBlair, Cambria, Huntingdon4 hr
Aug 9, 7:06 AM EDTFlash Flood WarningCTPLycoming, Union2 hr
Aug 9, 7:13 AM EDTAreal Flood WarningCTPFranklin5 hr
Aug 9, 7:27 AM EDTRiver Flood WarningCTPCumberland, York21 hr
Aug 9, 7:52 AM EDTFlash Flood WarningCTPLycoming, Tioga2 hr
Aug 9, 8:27 AM EDTTornado WarningCTPAdams, York33 min
Aug 9, 8:34 AM EDTAreal Flood WarningCTPAdams, Cumberland, Dauphin, Juniata, Northumberland, Perry and 2 more7 hr
Aug 9, 8:44 AM EDTFlash Flood WarningCTPAdams, York2 hr
Aug 9, 8:47 AM EDTAreal Flood WarningCTPCentre, Clearfield4 hr
Aug 9, 8:54 AM EDTFlash Flood WarningCTPTioga6 hr
Aug 9, 9:00 AM EDTAreal Flood WarningCTPJuniata, Mifflin, Perry6 hr
Aug 9, 9:18 AM EDTFlash Flood WarningCTPCumberland, Dauphin, York117 min
Aug 9, 9:30 AM EDTAreal Flood WarningCTPCentre, Clinton, Lycoming, Montour, Northumberland, Tioga and 1 more11 hr
Aug 9, 9:54 AM EDTAreal Flood WarningCTPCameron, Clearfield, Clinton, Elk, Lycoming, McKean and 2 more10 hr
Aug 9, 10:07 AM EDTFlash Flood WarningCTPYork113 min
Aug 9, 10:19 AM EDTRiver Flood WarningCTPBlair, Huntingdon5 hr
Aug 9, 10:22 AM EDTRiver Flood WarningCTPSnyder, Union22 hr
Aug 9, 10:58 AM EDTFlash Flood Warning EmergencyCTPPotter, Tioga6 hr
Aug 9, 11:33 AM EDTSpecial Weather StatementCTPSchuylkill42 min
Aug 9, 11:41 AM EDTAreal Flood WarningCTPCambria79 min
Aug 9, 11:49 AM EDTAreal Flood WarningCTPColumbia, Lycoming, Montour, Northumberland, Sullivan5 hr
Aug 9, 11:58 AM EDTRiver Flood WarningCTPHuntingdon16 hr
Aug 9, 12:06 PM EDTAreal Flood WarningCTPYork3 hr
Aug 9, 12:27 PM EDTAreal Flood WarningCTPSchuylkill3 hr
Aug 9, 12:34 PM EDTFlash Flood Warning Considerable damage threatCTPLycoming116 min
Aug 9, 12:45 PM EDTFlash Flood WarningCTPSullivan3 hr
Aug 9, 1:31 PM EDTRiver Flood WarningCTPTioga3 hr
Aug 9, 4:56 PM EDTRiver Flood WarningCTPCentre, Clinton12 hr

Nearby

Special Weather Statements in Pennsylvania, 2024Every special weather statement in 2024

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.